{
public class Program
{
- private static int Main ()
+ public static int Main ()
{
+ DateTime? a = default (DateTime?);
+ DateTime? b = default (DateTime?);
+ bool res = a == b;
+ if (!res)
+ return 4;
+
+ res = a != b;
+ if (res)
+ return 3;
+
decimal? D1 = null;
decimal? D2 = 7;